Ice crushing attachments for ice cream freezers



F. C. JAY

June 21,'1960 ICE CRUSHING ATTACHMENTS FOR ICE CREAM FREEZERS Filed April 22. 1959 ATTORNEY.

. applied thereto;

United States Patent ICF. CRUSHING ArrAcrmnNrs ron ICE CREAM FREEzERs Frederic C. Jay, Severna Park, Md., `assignor to Richmond Cedar Works Manufacturing Corporation, Richmond, Va., a corporation of Virginia Filed Apr. 22, 1959, Ser. No. 808,052 c 6 claims. (Crm1-101) Y This invention relates to ice Crushers, and more particularly to an ice crushing` attachment for ice cream freezers of the type comprising a tub and a rotary can mounted therein. i

As is well known, freezers of this type are` of two different kinds, namely, those made to be operated manually, by means of a hand crank, and those operated electrically by means of a motor. Some prefer one kind and `some `the other.

An object of the invention is to provide anice crushing attachment for use interchangeably with freezers equipped with either manual or electric drive. c

`Another object is to devise a simple and eifective construction of ice crusher capable of readily supplying the crushed ice required for the freezer.

With the above and other objects in view, andto improve generally on the details of such devices, the invention consists in the construction and combination of parts hereinafter described and claimed, and shown `in the accompanying drawings, forming part of this specication, and in which:

Fig.` 1 is a vertical sectional view through the upper part of a manually operated freezer with the can removed, showing my improved ice crushing attachment Fig. `2 is a similar view of `an electrically operated freezer, with the identical ice crushing attachment applied thereto; c

` Fig. 3 is a perspective view looking into the upper end of the improved stationary, concave crusher element;

Fig. 14 is a perspective view of the improved rotary crusher element; and

jFig. 5 isa face view of one end of such rotary element.

Referring to the drawings in detail and more particularly rst to Fig. 1 thereof, 1 designates the usual wooden tub and 2 the frame `which extends across and is supported by the top of the tub. In this frame isjournaled a shaft 3 having at its end a hand crank 4.

The frame 2carries at its end remote from the hand crank a lug 5 which is engaged by a swinging clasp 6 pivoted at 7. The frame rests in a `pair of notches 8 formed in the upper edge of the tub, as best shown in Fig. 3.

At the end of the frame adjacent the crank 4 are a pair of outwardly and upwardly projecting lugs 9 which extend through spaced openings in a bracket 10 fixed to the tubas by means of bolts or rivets 12, the bracket having a central notch 11 through which the shaft 3 extends.

At the inner end of the shaft 3 is secured a beveled pinion 13, and adjacent this pinion and substantially centered with respect to the tub the frame 2 is formed with a downwardly opening circular socket 14 and above this, with a smaller noncircular socket 15.

In hand-operated freezers of this type, the freezer can is provided with a top or cover having a beveled pinion formed integrally therewith, which pinion is adapted to mesh with the pinion 13, and aboveA the pinion carried 2,941,733 L Patented June` 21, 196() ICC o 2 o by the top or cover is a cylindrical boss adapted to turn in the socket 14. The stirrer or paddle which works inside of the freezer can has a stem with a noncircular end which tsinto the noncircular socket 15, thus holding the stirrer stationary while the can rotates.

Referring now to Fig. 2 which illustrates a common form of electrically operated freezera frame 16 extends across and is supported on the upper edge of the-tub and carries an electric motor 17. The` ends of this frame fit in notches 8 as before` and at each endis an outwardly projecting lug 18` adapted tofbe engaged by a clamping screw 19 working `through a` hook-shaped member 20 detachably engaged with a bracket 21 xed to the side ofthe tub. These brackets 21 serve as handles by which the tub may be lifted.

In connection with the electric motor 17,v reduction gearing is4 usually employed and enclosed in a gear box or casing 22. A rotary driving member 23 `is driven by this gearing and is formed with a square or other noncircular socket 24. The conventional freezer can top,

instead Aof being formed with a beveled pinion as in Fig.

l, is formed with a square or other noncircular boss which fits within the `socket 24, so that the can is rotated thereby. Above the socket 24 is an opening 25 through which the shank `of theusual stirrer, or paddle extends, andv itsupper end, whichmis noncircular, is received in a similarly shaped socket `26 iformed 4in theframejl, and is thus held stationary while the can rotates. y c c z All ofthe elements` so far described in `connection with Figs. l and 2 are more or less conventionaland constitute the usual construction o f existing freezers. They form no partof the present invention. The ice crusher attachment constituting the present invention comprises a sta-A tionary, concave crusher element 27, best shown in Fig. 3, and a cooperating rotary crusher element 34, `best shown in Fig. 5.

tionary element27 'is providedwith an outwardly extending vperipheral ange 31 which rests upon the upper edge of thertub. This ange is formed with a pair of notches 32 `registering with the notches 8 in the upper edge of the tub. The cross bar 30 at the bottom of the member 27 carries a central, upstanding stud 33 for apurpose hereinafter explained. It will be understood that when it is desiredto use the ice crushing attachment, the usual can is removed from the tub. ,l 4 o Referring to Figs. 4 and 5,j the improved `rotary- CruShing element comprises a cylindrical member 34 Aformed at one end with a beveled pinion 35 and, concentrically with said pinion, a circular boss 36. At the other Iend of the member 314 is a square boss 37 having a` central circular opening `38 therein.` Suitable teeth 39 extend radially from the cylindrical surface of the member 34 and co-operate with the teeth 28 on the stationary member.27 to, break or crush the ice confined between vthese two members. i i i When it s desired to employ the ice crushing attachment in connection with a manually operated freezer such as shown in Fig. l, the usual can `is removed from the tub and the stationary member 27 placed in position within the upper part of the tub, as shown in Figs. l and 3, the flange 31 resting on the upper edge of the tub and serving to securely support the concave element. The rotary crusher member 34 is then placed within the concave stationary element 27 with the square boss 37 at the bottom and with the circular socket 38 `therein fitting over the stud 33, as shown in Fig. l. The frame 2 is then placed imposition with the bevel gear '13 meshing with the pinion 35 and with the circular boss 36 journaled in the socket `14.

The frame 2 is then clamped in position. When the cranklll -is turned, it will berseen thatvthe gears 13 and 35V operate torotateV the crusherv element 34, and when l'u'mpsof icevare placed inthe stationary member 27 the ice is cracked or crushed and is discharged through the opening 29 into the tub. t

- When it is desired to use the ice crushing attachment in connection with the electrically operated freezer illustrated in Fig. 2, the can is removed and the concave element 27 placed in position as before. In this case, however, the rotary element 34 is reversed, the circular boss 36 being placed over the stud 33 so as to rotate thereon. The frame 16 is then Yplaced in position with the square boss 37 received inthe noncircular socket 24 formed in the rotating member 23. When', therefore, the motor opcrates, this rotary member 23 is driven and turns the crusher element 34 by means of the square boss 37, so that lumps of ice placed in the device are crushed and'discharge as before.V

It will thus be seen that I have provided an ice crusher which may be used interchangeably with either handoperated or electrically-driven freezers, the rotary elementy of the crusher being reversed in position when used in the two types of freezer. Y It will further be noted that in Fig. l the socket in the circular boss 36 has no function and neither does the square shape of the boss 37, but when reversed, as in Fig. 2, the socket in the'member 36 is journaled on the stud 33 and the square -boss 37 fits with- Y in the socket 24 of the driving member 23.

- It `will -be observed that my improved crusher comprises an inverted conical stationary element and a central rotary cylindrical element so that the space between these elements 'grows smaller from the top downward, Thus the larger pieces of ice are vcrushed or cracked in the upper part of the crusher while the smaller pieces are crushed inthe lower part just before they are discharged from the opening 29.

What I claim is:

1. An ice crushing attachment for ice cream freezers of the type having a tub and a rotary can mounted in said tub, a frame supported on said tub and carrying a shaft and crank, and a bevel gear mounted on said shaft, and said frame having a downwardly opening circular bearing socket adjacent said bevel gear, said attachment comprising a stationary concave'crushing element shaped to be supported concentrically on the top of said tub when the can is removed, and having a discharge opening at its bottom, and a cooperating rotary crushing element disposed within and journaled at its lower end on said stationary element, said rotary element having at its upper end a bevel gear constructed to mesh with and be driven by the bevel gear carried by said shaft, and also having, immediately above the bevel gear carried by said rotary element a bearing adapted to turn in said socket.

2. An Vice crushing attachment for ice cream freezers of the type having a tub, a frame supported on said tub and carrying an electric motor, a driving socket journaled in said frameY and operatively connected with said motor, said attachment comprising a stationary upwardly presenting concave crushing element shaped to be supported concentrically on the top of said tub, and having a discharge opening at its bottom, and a co-operating rotary crushing elementedisposed within and journaled at its lower end on said stationary element, said rotary element having at its upper end a polygonal stud shaped to tit into said driving socket.

3. An ice crushing attachment vfor ice cream freezers of the type having a tub, suchtubbeing either constructed to support a frame carrying a driving shaft and crank, or constructed to support a frame carrying an electric motor, said attachment comprising a stationary upwardly presenting concave crushing element shaped to be supported on the top of said tub, and having a discharge opening and an upwardly projecting stud at its bottom, and a co-operating crushing element disposed concentrically within said stationary element and rotatable about a vertical axis, said rotatable element having at each end a socket adapted to be journaled on said stud, whereby its position may be reversed, for use with either Vtype of drive andsaid rotatable element also having at oneend means by which it may be coupled'to said shaft'and crank, and at the other end means by which it may be coupled to said motor, whereby said rotatable element, depending on its position, may be driven interchangeably either by said crank or by said motor.

4. The combination with a stationary concave crushing element having an inwardly and axially projecting stud, of a coaxially disposed rotary crushing element comperating therewith, said rotary element having at one end ya polygonal stud and at the other end a circular bearing member, both said stud and said bearing member having a socketconstructed to fit over and be journaled on said axially projecting stud, whereby the position of said rotary crushing element relative to said stationary element maybe reversed.

5. The combination with a stationary concave crushing element having an inwardly and axially projecting stud, of a coaXially disposed rotary crushing element cooperating therewith, said rotary element having at each end means yby which it may be driven, and also having at each end a socket constructed to fit over and be journaled on said axially projecting stud, whereby the position of said rotary crushing element relative to said stationary element may be reversed.

u 61An ice rcrushing attachment for ice cream freezers of the type consisting of a tub, a rotary can mounted in the tub, and driving means supported on the top of the References Cited in the le of this patent UNITED STATES PATENTS 821,927 Dale May 29, 1906 1,116,096 Miller Nov. 3, 1914 1,746,654 Hufr'ord Feb. 11, 1930 2,165,763 Prichard July 1l, 1939 2,290,836 V McFerran July 21, 1942 Hagaman lune l0, 1947 

